Brad took 5 kicks and made 4 goals: 4/5.
This means denominator is total kicks and numerator is number of goals.
Now for Sydney total shots are 10.
so we have to find equivalent fraction of 4/5 with denominator as 10.
If we multiply denominator 5 by 2 we get denominator as 10.
So that means we have to multiply the fraction 4/5 with 2/2

This gives us 8/10 as equivalent fraction of 4/5.
Numerator represents goals.
Answer : Sydney must take 8 goals.